Driver could help SA murder investigation

The driver of a white four-wheel drive who was forced to stop their car on an Adelaide road in May to avoid a woman could have information key to a murder investigation.

Police are trying to find the driver, who was halted by a woman on Holden Hill's Argyle Road at about 6pm on May 3 and may unknowingly have information relating to the fatal stabbing of Michael McEvoy, 65, at his Holden Hill home that day.

The 41-year-old Adelaide woman found at the scene of the stabbing was arrested and has been charged with murder.